Cylinder for gas-engines and the like.



No. 896,543. I 4 PATENTED AUG. 18, 1908. G. HOUBEN.

" CYLINDER FOR GAS ENGINES AND THE LIKE.

APPLICATION IIILED FEB. 2, 1905.

CARL HOUBEN, or SAARBRUCKEN,

GERMANY, ASSIGNOR TO- EHRHARDT & SEHMER,

GESELLSOHAFT MIT BESOHRANKTER HAFTPFLIGHT, OF SGHLEIFMUHLE, NEARSAARBRUUKEN, GERMANY.

CYLINDER FOB GAS-ENGINES AND THE LIKE.

Specification of Letters Patent.

Patented Aug. 18, 1908.

Application filed February 2, 1905. Serial No. 243,873.

To all whom it may concern:

Be it known that I, CARL HoUBnN, engineer, a subject of the Emperor ofGermany, and residing at 10 Schloss ilatz, Saar-- briicken, Germany,have inventor a new and useful Improved Cylinder for Gas-Engines and theLike, of which the following is a specification.

The present invention relates to an improvement in the cylinders ofgas-engines and the like.

The raising of the pressure which has recently takenplace in the case ofgas-engines and the like, demands more and more strength on the part ofthe working cylinders of these machines, and itis difficult tomanufacture cylinders of somewhat large diameter for large gas-engines,which, in the presence of explosion pressures of 2025 atmospheres,possess sufficient strength and durability.

It is necessary to give to the working cylinders walls of unusuallygreat thickness to withstand the maximum pressure of the gases, whereasthe cooling jacket cast in one piece wth the working cylinder, requiresa wall of only slight thickness. On account of this unequal distributionof the iron in the double cylinder, internal stresses arise in the samewhich, on the cooling of the casting, or during the use of the finishedcylinder, not infrequently cause the formation of cracks.

The object of the present invention is to manufacture the cylinder withcooling jacket free from internal stresses by giving to the innerworking cylinder and to the outer cooling jacket, walls of equal orapproximately equal thickness.

A cylinder with cooling jacket, according to the present invention isillustratedin the accompanying drawing, in which Figure 1 is alongitudinal section of the same, and Fig. 2 a cross-section.

As shown in the drawing, the inner cylinder a has a wall, the thicknessof which is less than that corresponding to or less than under ordinarycircumstances would. be

' necessary to withstand the highest working ressure, whereas thecooling jacket b is ormed with a wall having a thickness greater thanthat corresponding to or necessar to withstand the ordinary pressure tow ich a coolin jacket is subjected, so that it 0011- possesses asurplusof strength.

sequent y thls surplus of strength In order to render useful for thestrengthening of the working cylinder, the space between the workingcylinder and the cooling jacket is traversed by water under pressure,which water both cools the cylinder walls and also, in consequence ofits small amount of compressibility, transmits as a rigid body so tospeak, all excess strain upon or yielding of the inner cylinder to thestrong cooling jacket, and consequently the excess material andconsequent reserve strength of the outer cylinder is rendered useful forthe reinforcement of the inner cylinder. Inorder to effect thistransmission of pressure in the highest degree, it is of courseimportant that neither airnor any other elastic gas be present in thecooling chamber. This is provided for by su plying the cooling water tothe cooling cliamber from below at the place 0, and by leading it offfrom the highest laces d d in order that a collection of air and gasbubbles in the cooling chamber may be avoided.

What I claim as my invention, and desire to secure by Letters Patent,is:

1. A cast cylinder for gas engines and the like comprising an internalworking cylinder having walls of a strength less than the de signedmaximum stress, an outer jacket with walls of substantially the samethickness as the working cylinder, and an intermediate space for apractically incompressible liquid.

A cast cylinder for gas engines and the like comprising an internalworking cylinder signed maximum working ressure of the gas,

an outer jacket'witlnwal s of substantially the same thickness as theworking cylinder, and means for supplying a practically incompressiblecooling medium at the lower portion of the space between the said wallsand for withdrawing the same at the upper portion of said space.

3. A cast cylinder for gas engines and the like comprising an internalworking cylinder having walls of a strength less than the (leslgnedmaximum worklng pressure of the gas,

an outer cooling jacket having walls of a reserve strength at leastequal to the deficit in the working cylinder walls, and means forsupplying. to the space between said wallsapractically incompressiblecooling medium.

4. A cast cylinder like comprising an internal working cylinder havingwalls of a strength less thanthe. de-

for gas engines and the signed maximum working pressure of the gas,

an outer cooling jacket with walls of substantially the same thicknessas the working cylinder, the reserve strength of the jacket walls beingat least e ual to the deficit in the working cylinder wa s, and meansfor supplying under pressible cooling medium at the lower portion 'ofthespace between said walls and for withpressure a practicallyinconidrawing the same at the upper portion of said 1 0 two subscribingwitnesses.

CARL HOUBEN. Witnesses:

WALTER HAUSING, WALTER SoHUMANN.

